JPS5931612B2 - Toilet bowl with cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toilet bowl having a device that sprays cleansing water toward the private parts after defecation to clean the private parts.

The purpose is to provide a toilet bowl with a flushing device that can always spray flushing water at a temperature comfortable for flushing.

The drawings showing the embodiments of the present application will be described below.

In FIGS. 1 and 2, 21 is the toilet bowl body, 22 is the toilet seat, and 23 is the case of the cleaning device, which is integrated with the toilet seat.

Reference numeral 24 denotes a nozzle attached to the case 23, which is directed so as to spray water for cleaning toward the private parts of the person sitting on the toilet seat 22.

Reference numerals 25, 26, and 27 are pipe bodies for supplying water for cleaning to the nozzle 24, and one end of the pipe body 25 is connected to a water pipe.

Reference numeral 2 denotes a valve interposed between pipe bodies 25 and 26, which is a solenoid valve, and when the operation switch 1 is closed, a current is supplied and the valve path is opened.

Reference numeral 3 denotes a heating device interposed between the tubes 26 and 27, which heats the low-temperature water from the tube 26 and sends it to the tube 27.

Reference numeral 28 denotes a power plug, which is connected to a commercial power outlet in order to supply current to the heating device 3 and the solenoid valve 2.

Next, in FIG. 3 showing the structure of the heating device 3, 30 is a casing, and the size is such that about 100 cc of water can fit inside.

31 is a lid body, and 32 is a water outlet, to which the pipe body 27 is connected.

33 is a cylindrical body made of alumina oxide,
A heater 5 and a sensor 6 are attached to its outer peripheral surface.

The heater 5 and sensor 6 are provided in an unfolded state as shown in FIG. 4, and both are constructed of the same well-known resistor.

The cylindrical body 33, the heater 5, and the sensor 6 have the same structure as a known ceramic heater.

34 is a water inlet, to which the pipe body 26 is connected.

Next, each member will be further explained, including FIG. 5, which shows a control circuit connected to the heating device 3 in block form.

First, the operation switch 1 is manually operated by the user to turn on and off, and when the switch is turned on, hot water is ejected from the nozzle 24 to cleanse the private parts.

Regarding the electromagnetic valve 2, its valve passage is normally closed, the valve passage is opened when the coil is energized, and the valve passage is closed when the coil is not energized.

The heating device 3 has a cylindrical airtight structure, and has a so-called ceramic heater in which a heater 5 and a sensor 6 are arranged in a cylindrical insulating cylinder. The outlet is connected to a nozzle through a pipe so that water passes around the outer periphery of the ceramic heater.

When the water supply is temporarily stopped, a certain amount of water (e.g. 100 cc
degree) remains.

4 is a switching element, which is set to 0N-OF by the gate signal.
For example, a triac is used.

The heater 5 is made by printing a resistor on the surface of a cylindrical ceramic, coating it with a ceramic insulation protective layer, and sintering it at high temperature.It generates heat when energized and changes the temperature of water passing through the surface. raise.

The sensor 6 is a cylindrical ceramic with a resistor printed on its surface, similar to the heater 5, and detects the temperature of water passing through the surface.

The characteristics are positive as the temperature increases (the resistance value also increases).

7 is a power supply circuit, which is equipped with a power transformer, a rectifier circuit, a smoothing capacitor, and a constant voltage circuit, and is configured to step down the commercial power supply and send out a full-wave rectified output, a positive constant voltage output, and a negative smoothed output. It has become.

8 is a resistance-voltage conversion circuit which converts a change in the resistance value of the sensor 6 into a change in voltage value, and when the output of the detected value correction circuit 9 is added, that signal is also added and output.

The detected value correction circuit 9 sends a correction signal to the resistance-voltage conversion circuit 8 when the signal from the valve operation detection circuit 14 is input.

This correction signal is, for example, 4 to 5 degrees Celsius of the detected temperature of the sensor 6.
corresponds to

When this correction signal is applied to the resistance-voltage conversion circuit 8, an output signal corresponding to a temperature increase of 4 to 5 degrees Celsius over the actual temperature detected by the sensor 6 is output.

10 is a comparison circuit that compares the signal of the resistance-voltage conversion circuit 8 and the signal of the reference value setting circuit 11;
This is a circuit that outputs an output when the signal is small.

The reference value setting circuit 11 is a circuit that sets a voltage value corresponding to the temperature of hot water discharged from the nozzle 24 (for example, 39° C.).

Reference numeral 12 denotes an AND circuit, which outputs an output only when the input from the comparison circuit 10 and the input from the zero-cross detection circuit 13 are received at the same time.

The zero cross detection circuit 13 is a circuit that receives the double wave rectified output of the power supply circuit 70 as an input and outputs a pulse output when the input voltage is zero.

The valve operation detection circuit 14 is a circuit that detects the operation or non-operation of the solenoid valve 2, and when it is operating, the output is 01.
An example is one that outputs an output when it is not operating.

Next, the operation of the above configuration will be explained.

First, the input terminal of the device, ie, the power plug 28, is connected to an AC power source (outlet).

Then, from the power supply circuit 7 to each circuit 8, 9, 10, 11, 1
3 and 14 are supplied with operating power.

When the operation switch 1 is turned on, the valve passage of the electromagnetic valve 2 is opened, and water is discharged through the heating device 3.

At this time, the switching element 4 immediately turns off due to the supply of power.
The heater 5 is turned on and the heater 5 is energized to instantaneously heat the water passing through the heating device 3 into hot water, which is then discharged through the nozzle 24.

After confirming that the hot water is being spouted, the operation switch 1 is turned off and the valve passage of the solenoid valve 2 is closed.

Then, the water supply is stopped, and the heating device 3 remains filled with water.

The temperature of this residual water is detected by a sensor 6, and the heater 50 is energized and controlled based on the temperature detected by the sensor 6 in preparation for use as described later.

Next, the power supply control to the heater 50 during the standby period will be explained.

The remaining water in the heating device 3 is heated by the heater 5.

The temperature is detected by the sensor 6, and a resistance value corresponding to the temperature is sent to the resistance-voltage conversion circuit 8 as a detection signal.

On the other hand, the detected value correction circuit 9 receives the output signal of the valve operation detection circuit 14 that detects the OFF state of the operation switch 1 (that is, the closing of the valve path of the solenoid valve 2), and adjusts the detected temperature of the sensor 6 to 4° C., for example. A correction signal (6th
(see Figure A) to the resistance-voltage conversion circuit 8.

The resistance-voltage conversion circuit 8 adds the detection signal from the sensor 6 and the correction signal from the detection value correction circuit 9, converts it into a voltage, and sends the voltage to the comparison circuit 10.

The comparison circuit 10 receives this from the reference value setting circuit 11.
A reference value signal is obtained by converting the optimal temperature of hot water discharged from a preset nozzle (for example, about 39°) into a resistance value relative to the temperature of the sensor 6, and converting this into a voltage (see Figure 6).
The reference value signal is compared with the signal from the conversion circuit 8 (see Fig. 6C), and the resistance-voltage conversion circuit 8
When the output signal of is thicker than the reference value signal, it L I/
level output signal (see Figure 6 2), and when it is small, 1
Output signals of "H" level (see FIG. 6, E) are sent to the AND circuits 12, respectively.

The AND circuit 12 receiving this receives a pulse signal synchronized with the zero point of the power frequency of the AC power source from the zero cross detection circuit 13 at its other input, so when both inputs reach 1H "Remil", the switching element 4 Gate signal (6th
(see figure).

When the switching element 4 receives a gate signal from the AND circuit 12, it operates to turn ON and energize the heater 5 (see Figure 6-G), and when the gate signal stops, it operates OFF and energizes the heater 5. Ru.

When the operation switch 1 is turned off, the temperature inside the heating device 3 due to the energization control of the heater 50 is lowered by the value of the correction signal of the detected value correction circuit 9 to prevent it from rising too much due to stagnant water. controlled by.

This is to prevent the initial temperature of the hot water discharged from the nozzle from becoming higher than the optimum temperature when the operation switch 1 is turned to the human position.

Next, a case where the user attempts to clean his private parts after excretion will be described.

Turn on operation switch 1. (At the time of FIG. 6C) Then, the coil of the solenoid valve 2 is energized via the power supply circuit 7, and the valve passage is opened.

Water is supplied by opening the valve path of the solenoid valve 2, and as this water passes through the heating device 3, it is instantaneously heated by the heater 5 to become hot water, and hot water at the optimal temperature is sprayed locally from the nozzle 24. Ru.

At this time, the initial hot water discharged from the nozzle 24 is water that remains in the heating device 3 and is heated when the operation switch 1 is turned off, but the temperature is adjusted so that it is lower than the temperature during use (detection Since only the value of the correction signal of the value correction circuit 9) is controlled, hot water with a temperature higher than the optimum temperature will not be discharged.

(See Figure 6) That is, to explain this in detail, the hot water temperature is set so that the temperature of hot water spouted from the nozzle 24 when the user turns on the operation switch 1 is, for example, 39°C.

At this time, the relationship between the heater 5 in the heating device and the water is that while the water is flowing, it receives appropriate heat from the heater 5 and is heated to the set temperature of 39°C, but when the operation switch 1 is turned off, Since the solenoid valve 2 is closed, the flow of water is stopped and the heater 5
The heat from the heater is transferred only to the water around the heater.

Since the heated water is not flowing, the temperature increase is not immediately transmitted to the sensor 6. Therefore, when the sensor 6 detects the same temperature as when the water is flowing, the water around the heater 5 Temperature rises considerably.

At this time, if you turn on the operation switch 1, the heater 5
Since high-temperature water around the device is discharged from the nozzle 24, the user is exposed to hot water with a temperature higher than usual at the beginning of use, causing discomfort.

However, since the temperature when the water is stopped is set 4 to 5 degrees lower than the temperature during use by the detected value correction circuit 9, the maximum temperature inside the heating device is exactly the optimum temperature during use. The temperature reached 39℃, and no high-temperature water was discharged at the beginning of use.

Next, temperature control during the above-mentioned use (when only one person is operating the switch) will be explained.

Hot water discharged from the heating device 3 is detected by a sensor 6.

The detection signal of this sensor 6 is sent to a resistance-voltage conversion circuit 8.

In response to this, the resistance-voltage conversion circuit 8 converts the detection signal from the sensor 6 into a voltage since the correction signal from the detection value correction circuit 9 has stopped (see Figure 6).
Send to 0.

In response to this, the comparison circuit 10 compares the output signal of the conversion circuit 8 (see Fig. 6) with the reference value signal of the reference value setting circuit 110 (see Fig. 6) in the same manner as described above, and performs resistance-voltage conversion. “L” when the output signal of the circuit 8 is thicker than the reference value signal.
An output signal of the level (see FIG. 6, W) is sent to the AND circuit 12, and an output signal of the ts Htt level (see No. 6) when it is smaller than the reference value signal is sent to the AND circuit 12.

Similarly to the above, when both human power outputs become "H" level signals, the AND circuit 12 sends a 'H' level signal (see Fig. 6, y) to the switching element 4 as a gate signal, and outputs it to the switching element 4.
N operation is performed, and the heater 5 is energized (see FIG. 6) to heat the water that is energized inside the heating device 3.

As described above, when the operation switch 1 is pressed, the detection signal of the sensor 6 is compared with the reference value signal by the comparison circuit 10 via the resistance-voltage conversion circuit 8 without being corrected, and the heater 50 is energized. Therefore, the water passing through the heating device 3 is heated by the heater 5 so that the temperature of the hot water discharged from the nozzle 24 becomes the optimum temperature, and the temperature of the hot water discharged from the nozzle 24 during use is teeth,
The optimum temperature is reached quickly and stabilized.

(See FIG. 6) Next, a specific example of the circuit shown in blocks in FIG. 5 is shown in FIG. 7.

In FIG. 7, each circuit element is represented by a well-known symbol mark.

Next, the operation will be explained based on this circuit.

In normal conditions, the power terminal or plug 28 is inserted into the outlet, and the operation switch 1 is open, so the electromagnetic pulp 2 is closed, but the heating device 3, which has the heater 5 and sensor 6, is assumed to be filled with water.

The AC power at the power supply terminal 28 is transformed by a transformer 34 and applied to a diode 35, and one of the two-wave rectified voltage on the positive side is connected to a diode 36fj! : The voltage is smoothed by a capacitor 37, and then becomes a constant voltage power source by a resistor 39, a Zener diode 40, a transistor 41, and a capacitor 42, and is supplied to various parts.

The other positive side double-wave rectified voltage is applied to the base of the transistor 50 via the resistor 48, but if the input is lower than the base-emitter voltage of the transistor 500, the transistor 50 is turned off and a voltage is output to the collector resistor 49, so the power supply A time pulsed output voltage corresponding to approximately zero volts of voltage is obtained.

The two-wave rectified voltage on one side of the diode bridge is smoothed by a capacitor 38, and is supplied to the solenoid valve 2 via a diode 45 and an operation switch 1.

The cathode side of the diode 45 is divided by the resistors 43 and 44 and becomes the input to the comparator 51, and the reference input of the comparator 51 is at ground potential, so when the operation switch 1 is opened, the voltage is divided by the resistors 43 and 44. With the addition of the pressure signal, the output of the comparator 51 becomes -.

Also, when the operation switch 1 is closed, the diode 45
The output of the comparator 51 becomes 0 because the cathode level becomes lower than the ground level by the forward voltage drop of the diode.

In this way, the valve operation detection circuit 14 detects the opening and closing of the operation switch 1.

On the other hand, the resistance value of the sensor 6 changes depending on the temperature of the water inside the heating device, which is converted into a voltage change by a resistor 57 and a capacitor 56, and becomes an input to a comparator 59.

The comparator 59, whose reference voltage is the divided voltage signal of the resistors 60 and 61, constantly compares the reference voltage and the detected voltage.

In the standby state, the operation switch 1 is in the open state, so the output of the comparator 51 is not at the no-y level, and the transistor 54 is operated via the diode 53.

Due to the operation of the transistor 54, DC power is applied to the sensor 6 via the resistor 55, so that the output voltage of the resistance-voltage conversion circuit 8 increases and is applied to the comparator 59.

The comparator 59 compares the output voltage from the conversion circuit 8 with one of the reference input signals, and when the signal from the resistance-voltage conversion circuit 8 is high, the output is O, but the output of the comparator 59 serves as an oven collector. Therefore, the output signal of the zero cross detection circuit 13 is grounded through the resistor 62,
Turn off transistor 63.

When the transistor 63 is off, the switching element 4 is out of conduction, so the heater 5 is also off, and the water in the heating device 3 is not heated.

On the other hand, when the signal of the resistance-voltage conversion circuit 8 is lower than the reference input signal, the output of the open collector of the comparator 59 is turned off, but the signal of the zero cross detection circuit 13 becomes the input of the transistor 630, and the switching element 4 The gate current flows to turn on the heater 5 and raise the temperature of the water in the heating device 3.

Repeat this operation to keep the water in the heating device at a constant temperature.

However, as long as the operation switch 1 is open, the transistor 54 of the detected value correction circuit 9 is on and the resistor 55 is connected in series to the sensor 6, so a signal with a temperature higher than the actual detected temperature is sent to the comparator circuit 10. In addition, the temperature of the water inside the heating device is set lower than the reference temperature.

Next, during use, when the operation switch 1 is closed, the electromagnetic valve 2 is energized, and the water supply pipe 25 is energized.
, 26, the tap water is supplied to the heating device 3.

Since the potential on the cathode side of the diode 45 becomes low, the output of the comparator 51 becomes low, the transistor 54 is turned off, and the resistor 55 becomes irrelevant to the sensor 6.

When the temperature of the water inside the heating device decreases, the resistance value of the sensor 6 decreases, and the output voltage of the resistance-voltage conversion circuit 8 decreases and also decreases compared to the reference value, so the open collector output of the comparator 59 becomes OFF. , zero cross detection circuit 1
3 operates the transistor 63 through the resistor 62, and the heater 5 generates heat.

When the temperature of the water in the heating device rises, the resistance value of the sensor 6 rises, and the output of the resistance-voltage conversion circuit 8 becomes lower than the reference value, so the open collector terminal of the comparator 59 turns ON. Since the output of the zero cross detection circuit 13 is dropped to the ground side through the resistor 62, the transistor 63 is turned off, the heater 5 is no longer heated, and the water temperature stops rising.

As described above, the heater 5 is repeatedly energized and de-energized, and water at the temperature set to the reference value is discharged from the nozzle 24.

Next, FIG. 8 shows the results of actually measuring the temperature of water discharged from the nozzle 24 in the above configuration.

As shown in the figure, water is discharged at a substantially uniform temperature from the start of discharge to the end of discharge.

Next, FIG. 9 shows a different embodiment of the control circuit.

This circuit has a configuration similar to that shown in FIG. 7 except that the zero-cross detection circuit and the AND circuit are removed, and its operation is the same as that described above except that the description regarding these circuits is removed.

That is, to summarize, since the output of the comparator circuit 10 is directly connected to the switching element 4, the output of the comparator circuit 10 immediately turns on the switching element and causes the heater 5 to generate heat, thereby obtaining an appropriate temperature. The applied voltage is more likely to generate noise because it rises from an arbitrary point in the waveform compared to the waveform that rises from zero when there is a zero-cross detection circuit and an AND circuit, but the The temperature characteristics will be the same.

As described above, in the present invention, the solenoid valve 2 and the heating device 3 are interposed in the pipeline, and the heating device 3 has the following features:
The heater 5 is configured to instantaneously heat the water in the flow path from the water inlet 34 toward the water outlet 32 to make it hot water while the water entering from the water inlet 34 flows through the flow path toward the water outlet 32. Since it is arranged along the flow path of the water, when the solenoid valve 2 is opened to flush water and wash the private parts, the low-temperature inflow water is instantly warmed and turned into hot water from the nozzle 24. It has the feature of being able to squirt directly to the local area.

Moreover, in that case, the temperature of the hot water heated by the heater 5 is set closer to the water outlet 32 than the heater 5, and the heater 5
The heater 5 is constantly monitored by a sensor 6 located close to the heater 5, and if there is a change in the temperature of the hot water, the water is immediately turned on to the heater 5.
1 control, the temperature of the hot water discharged from the nozzle 24 can always be jetted at a preferable and stable temperature from the initial stage to the final stage of jetting, and the effect is that private parts can be washed extremely comfortably.

Being able to eject comfortable hot water using the instant heating method eliminates the need to store a large amount of hot water like in the case of water storage systems, and allows hot water to be heated from the low-temperature water inlet. This has the effect of reducing the size of the water flow path to the outlet, making it possible to downsize the device.

In addition, almost no thermal energy is required to keep the hot water warm, resulting in an energy saving effect.

Furthermore, the heater 5 is energized even when not cleaning according to the command from the sensor 6 installed in the flow path, so that the small amount of water remaining in the flow path is constantly heated. When the user opens the solenoid valve to spout water, hot water heated by the heater 5 can be spouted from the beginning of the spout, and cold water will not spout and cause discomfort to the user. It has a preventive effect.

Moreover, even if the heater 5 is designed to generate heat even when not cleaning as described above, a small amount of water remains in the flow path, so the heat generated by the heater 5 is transferred to the sensor 5 through the water remaining in the flow path. It has the advantage of transmitting temperature to the heater 5, thereby detecting the temperature, and appropriately suppressing the energization to the heater 5 based on the temperature detection.

This has the advantage that the heater 5 can be prevented from being damaged due to dry heating and can be used for a long life.

Furthermore, as described above, even when the solenoid valve 2 is not cleaned, the small amount of water remaining in the flow path is heated by the heater 5 according to the command from the sensor 6 located on the water outlet side of the heater 5. When the sensor 6 detects a temperature lower than that when the water is flowing, the code 8,
Since the energization to the heater 5 is restricted through the circuit indicated by 10, the energization to the heater 5 is stopped before the water temperature around the heater 50 becomes too high.
After all, it has the advantage of preventing abnormal increases in water temperature in local areas around the heater 50.

To reiterate, when the electromagnetic valve 2 is closed, the correction signal from the detection value correction circuit 9 is added to the detection signal from the sensor 6, and this is input to the comparison circuit 10.

Therefore, when the sensor 6 detects a low temperature, a detection signal corresponding to a high temperature is input to the comparator circuit 10, and as a result, the switching element 4 is controlled to limit energization to the heater 5.

As a result, heating of the water around the heater 5 is stopped before it becomes too hot, and an abnormal increase in the water temperature is prevented.

Generally, this means that if the water capacity in the heating device is as small as possible, the temperature change in the water around the heater 5 will not be immediately transmitted to the sensor 6, so the temperature around the heater 5 will be lower than the temperature detected by the sensor 6. The temperature of the water becomes significantly higher.

That is, when the sensor 6 detects the normal appropriate temperature, the water temperature around the heater 5 has become extremely high.

Furthermore, as explained in the text, if the user happens to open the solenoid valve when the temperature around the heater becomes extremely high, the water flowing into the heating device 3 will cause the high temperature around the heater to rise. The drawback is that the water is forced out of the nozzle and the user's private parts may be sprayed with extremely hot water.

In contrast, in the present invention, as described above, when the sensor 6 detects a temperature lower than normal, the supply of electricity to the heater 5 is already restricted. This has a great effect in making it possible to put the heating device into practical use.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and Fig. 1 is a partially cutaway plan view, Fig. 2 is a partially cutaway side view, Fig. 3 is a sectional view of the heating device, and Fig. 4 is a diagram of the heater and sensor. 5 is a block diagram of a control circuit, FIG. 6 is a waveform diagram, FIG. 7 is a circuit diagram, FIG. 8 is a measurement graph of changes in water temperature, and FIG. 9 is a block diagram showing a different embodiment. 21...Toilet bowl body, 22...Toilet seat, 2
4... Nozzle, 25, 26, 27...
Pipe body, 3... Warming device, 5... Heater, 6... Sensor.

Claims (1)

[Claims] 1. A toilet bowl equipped with a toilet seat is equipped with a nozzle for squirting water for cleaning toward the private parts of the person sitting on the toilet seat, and the nozzle is configured to supply water for cleaning to the nozzle. A conduit is provided, and the conduit is provided with a solenoid valve that can be opened and closed, and a heating device that heats the washing water passing through the conduit. An operating switch that can be opened and closed is provided, and when the operating switch is operated to open the solenoid valve, hot water for cleaning heated by the heating device is spouted from the nozzle. In the toilet bowl with a flushing device, the heating device has a water inlet, a water outlet, and a passageway that connects them and allows a small amount of water to remain inside, and directs the water flowing in from the water inlet to the above-mentioned flow. A casing that directs the water to the water outlet through a channel and causes the water to flow out from the water outlet; a heater disposed along the flow path; and a heater disposed within the casing that is located closer to the water outlet than the heater and within the casing so as to be able to detect the temperature of the hot water heated by the heater and directed toward the water outlet. the heater is connected to a power source via a switching element configured to control energization of the heater, and a reference value signal corresponding to the optimal temperature of the hot water is provided. a reference value setting circuit configured to emit a temperature, which receives a reference value signal from the reference value setting circuit and a temperature detection signal from the sensor, and generates a temperature that corresponds to the detection signal rather than the temperature corresponding to the reference value signal. and a comparison circuit configured to output a signal to the switching element to limit energization to the heater when the temperature of the heater becomes high,
On the other hand, the pulp operation detection circuit that detects the opening and closing of the solenoid valve and the signal that detects the closing of the solenoid valve are received from the valve operation detection circuit and are added to the next stage circuit. A detection value correction circuit configured to output a correction signal for causing the temperature detection to be performed is provided, and a temperature detection signal from the sensor and a correction signal from the correction circuit are provided between the sensor and the comparison circuit. 2. A toilet bowl with a cleaning device, characterized in that a circuit is provided which adds a correction signal to the temperature detection signal and supplies the added signal to the comparison circuit.